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17.3. Viewing CPU Usage

17.3.1. Using the System Monitor Tool

The Resources tab of the System Monitor tool allows you to view the current CPU usage on the system.
To start the System Monitor tool, either select ApplicationsSystem ToolsSystem Monitor from the Activities menu, or type gnome-system-monitor at a shell prompt. Then click the Resources tab to view the system's CPU usage.
System Monitor — Resources
The Resources tab of the System Monitor application.
Figure 17.3. System Monitor — Resources

In the CPU History section, the System Monitor tool displays a graphical representation of the CPU usage history and shows the percentage of how much CPU is currently in use.